The function reuse-interfaces-p
is the predicate for whether global interface re-use is enabled.
The function (setf reuse-interfaces-p)
enables or disables global interface re-use.
If global re-use is enabled, then locate-interface and find-interface may return existing interfaces. If global re-use is disabled, then locate-interface returns nil
and find-interface returns a new interface.
CAPI User Guide and Reference Manual (Macintosh version) - 3 Aug 2017